Artemisia borealis |
Artemisia stelleriana |
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boreal wormwood, field sagewort |
armoise de Steller, beach wormwood, dusty miller, oldwoman, Steller's wormwood |
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Habit | Perennials, (6–)8–20(–40) cm (cespitose), mildly aromatic; taprooted, caudices branched. | Perennials, (15–)20–60(–70) cm (mat-forming), sometimes faintly aromatic (rhizomes creeping, relatively thin). | ||||
Stems | (1–)2–5, gray-green, tomentose. |
1–3, erect or ascending, white, simple (stout), densely tomentose to floccose. |
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Leaves | persistent, basal rosettes persistent, gray-green to white; blades ovate, 2–4 × 0.5–1 cm, 2–3-pinnately or -ternately lobed, lobes linear to narrowly oblong, apices acute, faces moderately to densely sericeous. |
basal and cauline (petiolate), silver-gray; blades oblanceolate, (proximalmost) 3–10 × 1–5 cm, pinnatifid (lobes relatively broad, rounded; distal leaves, on flowering stems, smaller), faces densely tomentose. |
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Involucres | hemispheric, 3–4 × 3.5–4 mm. |
broadly campanulate, 5–8 × 6–7 mm. |
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Florets | pistillate 8–10; functionally staminate 15–30; corollas (or lobes) yellow-orange or deep red, 2.2–3.5. |
pistillate 12–16; bisexual 25–30; corollas yellow (narrow or tubular), 3.2–4 mm (unusually large), glabrous or sparsely hairy (style branches prominent, erect, blunt). |
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Phyllaries | (obscurely scarious) densely tomentose-villous. |
broadly lanceolate, tomentose. |
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Heads | (proximal sessile, distal pedunculate) in (leafy) spiciform arrays 4–9(–12) × (0.5–)1–5 cm. |
(erect or spreading, peduncles 0 or to 3 mm) in dense, paniculiform, racemiform, or spiciform arrays 8–20 × 2–4 cm. |
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Cypselae | oblong-lanceoloid, somewhat compressed, 0.4–1 mm, faintly nerved, glabrous. |
(dark brown) narrowly oblong-linear (slightly flattened, smooth), 3–4 mm, glabrous. |
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2n | = 18. |
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Artemisia borealis |
Artemisia stelleriana |
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Phenology | Flowering early spring–fall. | |||||
Habitat | Sandy soils, coastal strand | |||||
Elevation | 0–200 m (0–700 ft) | |||||
Distribution |
AK; CA; CO; ID; MT; UT; WA; WY; AB; BC; NT; NU; SK; YT; especially at high elevations and northern latitudes; Eurasia
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AK; CT; DE; FL; LA; MA; MD; ME; MI; MN; NC; NH; NJ; NY; OH; PA; RI; VA; VT; WA; WI; WV; NB; NF; NS; ON; PE; QC; SPM; n Europe; e Asia (Japan, Kamchatka)
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Discussion | Subspecies 2 (2 in the flora). (Discussion copyrighted by Flora of North America; reprinted with permission.) |
Artemisia stelleriana is apparently native along the western tip of the Aleutian islands (D. F. Murray, pers. comm.). It is an attractive ornamental and, in parts of its range in the flora area, it appears to have escaped from cultivation and is naturalized in beach dunes and other sandy habitats. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Key |
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Source | FNA vol. 19, p. 505. | FNA vol. 19, p. 532. | ||||
Parent taxa | Asteraceae > tribe Anthemideae > Artemisia > subg. Drancunculus | Asteraceae > tribe Anthemideae > Artemisia > subg. Artemisia | ||||
Sibling taxa | ||||||
Subordinate taxa | ||||||
Synonyms | A. campestris subsp. borealis | |||||
Name authority | Pallas: Reise Russ. Reich. 3: 755. (1776) | Besser: Nouv. Mém. Soc. Imp. Naturalistes Moscou 3: 79, plate 5. (1834) | ||||
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